To view help information, you must specify a help file when calling the WinHelp
function. The help file must have the Windows Help (.HLP) file format and
have one or more topics
. Each topic is a distinct unit of information, such as a conceptual
description, a set of instructions, a picture, a glossary definition, and so on. Topics
must be uniquely identified so that Windows Help can locate the topic whenever
it is requested. Internally, Windows Help uses topic identifiers
to locate topics, but applications most often use context identifiers
(unique integer values) to specify topics to display. The help file author
must explicitly map context identifiers to topic identifiers in the [MAP] section
of the project file used to build the help file.
When you specify a help file but you do not specify a path, WinHelp
looks for the help file in the Help directory or in a directory specified by
the PATH environment variable. In addition, WinHelp
can find a help file whose name is listed in the following registry location:
To take advantage of the registry, you must create a value name that has the
same name as your help file. The value assigned to that name must be the
directory where the help file resides.
cannot find the given help file, it displays a dialog box that allows the
user to specify the location of the help file. Because WinHelp
saves the location information in the registry, WinHelp
does not ask again for the location of the same help file.
For more information about how to author and build a help file, see the
documentation provided with your development tools.
- Software for developers
Software for Android Developers
- More information resources
Unix Manual Pages
- Databases for Amazon shops developers
Amazon Categories Database
Browse Nodes Database